Professional Soma Fix Expanding Foam - S805

SOMAFIX Polyurethane Foam S805 is a high-performance, single-component expanding foam designed for...

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B&QB&Q - Expanding FoamMultipurpose Polyurethane Foam Filler For DoorsPipesFramesWindowsCracks & Holes + All Weather (500Ml)
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OnBuy.comExpanding Foam (500Ml) Multipurpose & All Weather Polyurethane Filler Foam 8697433520070
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eBayExpanding Foam (500ml) Multipurpose & All Weather Polyurethane Light Yellow
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Product Information

Full details

The Professional Soma Fix S805 is a high-performance, single-component expanding foam ideal for professional contractors and DIY enthusiasts who need a reliable solution for gap-filling, insulation, and mounting applications. Its primary benefit lies in its exceptional bonding strength and ability to create a durable, weather-resistant seal across various surfaces like wood, metal, and concrete. However, users should note that the foam expands rapidly and cures via ambient moisture, meaning precise application is necessary to avoid excessive overspill that requires trimming.

All features

Model Part NumberS805
Brandprofessional soma fix

Extended Product Information

FAQs

Can I use S805 on wet surfaces?

Yes, it is designed to cure with ambient moisture, but avoid standing water or heavy rain during application.

Is this foam paintable once cured?

Yes, once the foam has fully cured and been trimmed, it can be painted or plastered over to match the surrounding finish.

How do I remove wet foam from my skin?

Do not let it dry. Use an industrial cleaner or acetone-based solvent immediately, then wash thoroughly with soap and water.

Can this be used for structural load-bearing?

No, S805 is a gap-filler and insulator, not a structural adhesive or load-bearing material.

Is the foam waterproof?

Yes, it is resistant to moisture, steam, and even seawater, making it excellent for sealing pipe penetrations.

What is the storage life of the canister?

Store in a cool, dry, and well-ventilated area in an upright position to maintain the shelf life indicated on the product packaging.

Troubleshooting

Foam is not expanding as expected

Ensure the surface is slightly moist, as the curing process relies on ambient humidity. If the area is bone-dry, lightly mist it with water before application.

Excessive foam overflow

Reduce the application pressure or quantity. The foam expands significantly after leaving the nozzle; fill only half of the void to accommodate this expansion.

Foam remains tacky for a long time

Ensure adequate air circulation and humidity in the room. In very dry climates, a light misting of the foam surface can accelerate the curing process.

Pros and Cons

Pros

  • Excellent adhesion to multiple substrate types
  • Effective thermal and sound insulation properties
  • Highly resistant to harsh weather and chemical exposure
  • Easy to apply for both DIY and professional users
  • Durable, long-lasting structural bond

Cons

  • Rapid expansion requires careful application technique
  • Uncured foam can be difficult to remove from surfaces
  • Requires proper ventilation during the curing process
  • Not intended for structural load-bearing applications

Setup, Compatibility & Care

Before application, ensure that surfaces are clean, free of dust, and slightly dampened to facilitate the moisture-curing process. Shake the container well before use. Apply the foam to the gap, filling it only about 50-70% full, as the material will expand to occupy the remaining space. After application, allow the foam to fully cure before trimming any excess material with a sharp knife. When not in use, store the canister in an upright position in a cool, dry place. Always wear protective gloves and eyewear during application, as the foam is sticky while wet and difficult to remove from skin and clothing.

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